GPT‑5 produces higher-quality responses by using your company’s files and connected apps like Google Drive, SharePoint, and more, while respecting existing permissions.

Aug 7, 2025 · GPT‑5 is the new default in ChatGPT, replacing GPT‑4o, OpenAI o3, OpenAI o4-mini, GPT‑4.1, and GPT‑4.5 for signed-in users. Just open ChatGPT and type your question; GPT‑5 …

Learn about how to use and migrate to GPT-5.1 and the GPT-5 model family, the latest models in the OpenAI API.

For the latest Chat model, please refer to our models page. We recommend GPT-5.1 for most API usage, but feel free to use this GPT-5.1 Chat model to test our latest improvements for chat use cases.

Nov 30, 2022 · We performed several iterations of this process. ChatGPT is fine-tuned from a model in the GPT‑3.5 series, which finished training in early 2022. You can learn more about the 3.5 series …

Feb 27, 2025 · We’re releasing a research preview of GPT‑4.5—our largest and best model for chat yet. GPT‑4.5 is a step forward in scaling up pre-training and post-training.

Aug 11, 2025 · The GPT-5 Chat model (named gpt-5-chat-latest) you’re seeing is actually a bit different from the main GPT-5 model. Basically, the GPT-5 model is the one built specifically for reasoning …

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Mar 14, 2023 · GPT-4 is capable of handling over 25,000 words of text, allowing for use cases like long form content creation, extended conversations, and document search and analysis.

ChatGPT is fine-tuned from GPT-3.5, a language model trained to produce text. ChatGPT was optimized for dialogue by using Reinforcement Learning with Human Feedback (RLHF) – a method …